[1] KELTON D F,LISSEMORE K D,MARTIN R E.Recommendations for recording and calculating the incidence of selected clinical diseases of dairy cattle[J].Journal of Dairy Science,1998,81(9):2502-2509. [2] GIRAUDO J A,CALZOLARI A,RAMPONE H,et al.Field trials of a vaccine against bovine mastitis.1.Evaluation in heifers[J].Journal of Dairy Science,1997,80(5):845-853. [3] USMAN T,WANG Y,LIU C,et al.Novel SNPs in IL-17F and IL-17A genes associated with somatic cell count in Chinese Holstein and Inner Mongolia Sanhecattle[J].Journal of Animal Science & Biotechnology,2017,8(1):5-14. [4] WANG X,MA P,LIU J,et al.Genome-wide association study in Chinese Holstein cows reveal two candidate genes for somatic cell score as an indicator for mastitis susceptibility[J].BMC Genetics,2015,16(1):1-9. [5] THOMPSON-CRISPI K A,HINE B,QUINTON M,et al.Short communication:Association of disease incidence and adaptive immune response in Holstein dairy cows[J].Journal of Dairy Science,2012,95(7):3888-3893. [6] THOMPSON-CRISPI K A,SEWALEM A,MIGLIOR F,et al.Genetic parameters of adaptive immune response traits in Canadian Holsteins[J].Journal of Dairy Science,2012,95(1):401-409. [7] THOMPSON-CRISPI K A,MIGLIOR F,MALLARD B A.Incidence rates of clinical mastitis among Canadian Holsteins classified as high,average,or low immune responders[J].Clinical and Vaccine Immunology,2013,20(1):106-112. [8] 肖定汉.奶牛病学[M].北京:中国农业大学出版社,2011. XIAO D H.Diseases of Dairy Cattle[M].Beijing:China Agricultural University Press,2011.(in Chinese) [9] TESFAHEYWET Z,GEREMA A.Prevalence and bacterial isolates of mastitis in dairy farms in selected districts of Eastern Harrarghe Zone,Eastern Ethiopia[J].Journal of Veterinary Medicine,2017,5:1-7. [10] HIITIO H,VAKKAMAKI J,SIMOJOKI H,et al.Prevalence of subclinical mastitis in finnish dairy cows:Changes during recent decades and impact of cow and herd factors[J].Acta Veterinaria Scandinavica,2017,59(1):22-35. [11] MEKONNEN S A,KOOP G,MELKIE S T,et al.Prevalence of subclinical mastitis and associated risk factors at cow and herd level in dairy farms in North-West Ethiopia[J].Preventive Veterinary Medicine,2017,145:23-31. [12] GILLESPIE B E,OLIVER S P.Simultaneous detection of mastitis pathogens,staphylococcus aureus,streptococcus uberis,and streptococcus agalactiae by multiplex Real-time polymerase chain reaction[J].Journal of Dairy Science,2005,88(10):3510-3518. [13] REITEN M,ROUSING T,THOMSEN P T,et al.Mortality,diarrhea and respiratory disease in Danish dairy heifer calves:Effect of production system and season[J].Preventive Veterinary Medicine,2018,155:21-26. [14] WINDEYER M C,LESLIE K E,GODDEN S M,et al.Factors associated with morbidity,mortality,and growth of dairy heifer calves up to 3 months of age[J].Preventive Veterinary Medicine,2014,113(2):231-240. [15] PARDON B,HOSTENS M,DUCHATEAU L,et al.Impact of respiratory disease,diarrhea,otitis and arthritis on mortality and carcass traits in white veal calves[J].BMC Veterinary Research,2013,9:79-91. [16] 史良玉,张瑞强,李想,等.北京地区中国荷斯坦牛体细胞评分差值变化规律及遗传力估计[J].畜牧兽医学报,2018,49(5):70-76. SHI L Y,ZHANG R Q,LI X,et al.Heritability estimation of SCS difference and its variation in Chinese Holstein cattle in Beijing[J].Chinese Journal of Animal and Veterinary Sciences,2018,49(5):70-76.(in Chinese) [17] 李世平,毛永江,常洪,等.南方地区中国荷斯坦牛乳中体细胞数变化规律的研究[J].中国畜牧杂志,2008,3:7-9. LI S P,MAO Y J,CHANG H,et al.Study on variability of somatic cell counts in the milk of Chinese Holstein cattle in South China[J].Chinese Journal of Animal Science,2008,3:7-9.(in Chinese) [18] 甘宗辉,杨章平,李云龙,等.奶牛乳房炎的细菌感染与奶中体细胞数及乳成分的关系[J].畜牧兽医学报,2013,44(6):972-979. GAN Z H,YANG Z P,LI Y L,et al.Relationship of bacterial infection with somatic cell count and milk composition in dairy cows with mastitis[J].Chinese Journal of Animal and Veterinary Sciences,2013,44(6):972-979.(in Chinese) [19] 金亚东,李艳艳,徐晓锋.胎次和泌乳阶段对奶牛体细胞数和乳损失量的影响[J].乳业科学与技术,2016,39(3):9-13. JIN Y D,LI Y Y,XU X F,et al.Effects of parity and lactation stage on somatic cell score and milk production loss in dairy cows[J].Journal of Dairy Science and Technology,2016,39(3):9-13.(in Chinese) [20] LARMER S G,MALLARD B A.High immune response sires reduce disease incidence in North American large commercial dairy populations[J].Cattle Practice,2017,25:74-81. |